<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" v-model="checked" />
    </label>
    <span>
      <span>已完成{{ isDoneCount }}</span> / 全部{{ totalCount }}
    </span>
    <button
      class="btn btn-danger"
      @click="deleteChecked"
      v-show="!!isDoneCount"
    >
      清除已完成任务
    </button>
  </div>
</template>

<script>
export default {
  name: 'Footer',
  methods: {
    deleteChecked() {
      this.deleteTodos()
    },
  },
  computed: {
    checked: {
      get() {
        return this.totalCount > 0 && this.isDoneCount == this.totalCount
      },
      set(val) {
        this.updateTodos(val)
      },
    },
  },
  props: {
    isDoneCount: Number,
    totalCount: Number,
    updateTodos: Function,
    deleteTodos: Function,
  },
}
</script>

<style>
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>
